johnson



2Sheets-Sheet-1' I 191.48 J0 hns on;

(No Model.)

Patented No-v. 17, 1896.

mNw/N/A 2 Sheets-,Sheet 2. L. JOHNSON.

(No Model.)

vDRAG SAW.

No.` 571.446. Patented Noml?, 1896.

. @www NIN.

UNITED STATES @ATENT ,e OFFICE.

LEVIS JOHNSON, OF RUSTON, LOUISIANA, ASSIGNOR TO ROBERT J.

` RASBURY, OF SAME PLACE.

DRAG SAW.

SPECIFICATION forming part of Letters Patent No. 571,446, dated November17, 1896. Application filed January 17, 1896. serai No. 575,869. (Nomodel.)

To all whom it may concern:

Be it known that I, Lnwrs JOHNSON, a citizen of the United States,residing at Ruston, in the parish of Lincoln' and State of Lo`uisiana,have invented a new and useful Drag- Saw, of which the following is aspecification.

This invention relates to an improvement in drag-saws, and has for itsobject to provide a simple, inexpensive, and easy-running saw of theclass described, which may be mounted upon a truck for adapting the sameto be carried from place to place, and in which provision is made foradjusting the height or angle of the saw-arm and the leverage exertedthereon.

A very important object of the invention is to so construct the truckand `mount the carrying-wheels thereof that the' latter may be changedas to their relation to the truck for enabling the latter to be movedlongitudinally of the log being operated upon,or at right angles totheir normal position when in use for transportation.

To this end the invention consists in an improved portable drag-sawembodying certain novel features and details of construction andarrangement of parts, as hereinafter fully described, illustrated in thedrawings, and finally pointed out in the claims.

In the accompanying drawings, Figure l is a perspective view of adrag-saw embodying the `present improvements. Fig. 2 is a bottom planview of the truck. Fig. 3 is a detail perspective view of one of thepivoted stub-axles. Fig. 4L is an enlarged detail View of the saw-arm.Fig. 5 is a detail section showing the manner of mortising theframebars. Fig. 6 is a detail section showing the manner of securing thesaw-blade to th'e sawarm.

Similarnumerals of reference designate corresponding parts in theseveral figures of the drawings. i l

Referring to the accompanying drawings, l designates a suitabletruck-frame, which is preferably constructed of four substantially equaland similar frame-bars crossing each other in parallel pairs, as shown.The longitudinal bars 2 of the frame are provided either in their upperor lower faces and at a slight distance from their opposite ends withstubaxle.

mortises, and the transverse bars 3 are correspondingly formed withreversely-disposed" stubmiortises which enter the mortises in thelongitudinal bars, thus bringing the upper 5`5 and lower faces of lallthe bars into the same planes. By this arrangement the longitudinal andtransverse truck-timbers intersect each other and project beyond thecorners of lthe frame, where they are provided with ver- 6o `pivot 6 asa center and changed from the full-line position to the dotted-lineposition shown in Fig. 2, or viceversa. The vertical openings 4 in theprojecting ends of the frametimbers are located at points equidistantfrom the pivot 6, whereby a retaining-pin 7 may be inserted througheither one of the two openings at a given corner of the frame and into acommon ertioal opening S in the stub- In this manner the wheels may bechanged from their normal longitudinal disposition to a transverseposition, or one at right angles to the normal, so that after the sawhas been moved up to the log to be operated upon the truck and themechanism mounted thereon may readily be moved longitudinally of saidlog, as required, while at the same time the wheels will serve to blockany longitudinal movement of the apparatus.

9 represents a transverse bar which is superposed above the rear pair ofwheels and connected rigidly with the truck-frame by means of a pair ofshort standards or posts, as shown. From the transverse bar 9 twostandards 10 project upwardly, said standards being arranged at theopposite ends of the bar 9 and provided at their upper extremities withbear` ings for a transversely-disposed crank-shaft 11V having a centralopen crank-arm l2. To the opposite extremities of the crank-shaft 1l aresecured iiywheels 13, which serve to IOO steady the motion of said shaftand to equalize the movements of the saw. From the center of thetransverse bar 9 an upwardlyinclining fulcrum-beam 14E extends forward,the same being attached rigidly at its rear end to the bar 9 andsupported at a point intermediate its ends by a pair of parallelvertical posts 15, between which the fulcrumbeam is mounted. Pivotallymounted in the bifurcated forward extremity of the beam 1l is a lever16, which is provided adjacent to its middlev portion with two or moretransverse perforations for the reception of the fulcrum-pin, thusenabling said lever to be adjusted as to its 'fulcrum for increasing ordiminishing the power of the saw-drivin g mechanism, according towhether soft or hard wood is being operated upon. A connectingrod 17 isinterposed between the upper end of said lever and the crank-arm of theshaft 11, and the lower end of said lever is bifurcated to receivepivotally the inner end of the saw-arm 18. The saw-arm 18 may be made ofany desired length and is slotted at its outer end to receive the innerend of the sawblade 20, which is held therein by bolts or rivets. Thesaw may be operated by means of a crank-handle 22 on one of theIly-wheels, or by a forwardly-projecting handle 23, connected with thecentrally-arranged lever 16.

In order to prevent the saw from dragging upon the ground while wheelingthe machine from place to place, I provide a removable tongue 24, theinner end of which may beinserted into a socket in the forwardtransverse bar of the truck-iframe, the outer end thereof being formedwith a vertical opening for the shank portion of a fork 25, projectingupwardly from said tongue and carrying a roller 26, upon which the edgeof the saw may rest when not in use. The lower shank portion of the forkbeneath the tongue may be used as a handle for wheeling the saw to andfrom the field of operation.

27 designates a gravity-arm which is made substantially in elbow shapeand provided in one of its arm portions with several transverseperforations for the reception ot a pivot, also passing through theforward extremity of the bifurcated beam 14. To the free or pendent endof the elbow-arm is attached a weight 2S, which rests upon the upperedge of the sawarm and, if desired, may be grooved in its under side topartially embrace said sawarm and prevent lateral displacement of theweight while thesaid saw-arm is reciprocating. By this construction therequired weight or pressure may be applied to the saw-arm andtransmitted to the saw for enabling the latter to cut with the desiredspeed.

By means of the construction above described a very simple, inexpensive,and efficient drag-saw is provided, which is capable of beingeasilymoved from place to place, and afterbeing adj usted into thedesired proximal relation to a log may have its truck-wheels adjusted insuch manner that the truck may be moved progressively to the desiredpoint longitudinally of said log. Several means for operating the saware also shown and described, and this will effect a saving in the laborrequired to run the machine, as the operator may readily change hisposition and rest one set of muscles while bringing another set intouse.

Itwill be apparent that changes in the form, proportion, and minordetails of construction may be resorted to without departing from thespirit or sacrificing any of the advantages of this invention.

Having thus described the invention, what is claimed as new is- 1. In aportable drag-saw, the combination with a truck-frame carrying the sawmechanism, of the earrying-wheels mounted on reversible stub-axlescapable of being adjusted longitudinally or transversely of thetruckframe, and a detachable tongue for supportH ing the saw when not inuse, said tongue being provided at its outer end with a supporting-roller and having its inner end removably fitted in the truck-framewhereby it may be removed while the saw is in operation, substantiallyas described.

2. In a portable drag-saw, a rectangular truckframe comprising parallellongitudinal and transverse bars intersecting and crossing each other atthe corners of the frame and projecting beyond such corners, each barhav ing vertical openings in said projecting portions, in combinationwith stub-axles extend ing horizontally under the projecting ends ofsaid bars and fulcrumed on vertical axes at the intersection of saidbars, carrying-wheels on said axles, and stay-pins removably insertedthrough said vertical openings in the projecting ends of the-bars, saidpins also interchangeably engaging the stub-axles for holding the sameeither longitudinally or transversely of the truck-frame, substantiallyas described.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two witnesses.

hi LnwIs XS JOHNSON.

mark:

lVitnesses:

J. W. WILLIAMS, S. M. LEWIS.

IOC

IIO

